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api.delx.ai x402 is-hex-shape
https://api.delx.ai/api/v1/x402/is-hex-shape
payable
Validate even-length hex (optional 0x). Call when you preflight calldata/hash hex before chain tools. Returns valid boolean for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.001
- Network
- base
- Pay to
- 0x9f8bd9875b3E0b632a24A3A7C73f7787175e73A2
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 167 ms
- Payment options
- 3 usable of 3
- Last checked
- 2026-08-10T09:13:22.741Z (1d ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.delx.ai%2Fapi%2Fv1%2Fx402%2Fis-hex-shape"